I'm not 100% sure on the terminology, but I assume you are asking if the pipes for flow and return are on the same side of the rads, or on separate ends?
The flow and return pipes are on separate ends of the rads.
I need a bit of advice.
The g/f and I moved into our first home a few months back, and I have been looking to put some TRVs on my rads, and while I have the system drained use the opportunity replace an old rad.
I went ahead and ordered the rad and 5 TRVs online, they've arrived today and...